Mine

Index: System/Uri.cs
===================================================================
--- System/Uri.cs       (revision 56768)
+++ System/Uri.cs       (working copy)
@@ -1715,6 +1715,16 @@
 
                        throw new NotImplementedException ();
                }
+
+               public static bool operator== (Uri one, Uri two)
+               {
+                       return one.Equals (two);
+               }
+
+               public static bool operator!= (Uri one, Uri two)
+               {
+                       return !one.Equals (two);
+               }
 #endif
        }
 }